Problema Solution
A book contains the following recommended weight for a kangaroo: "Give the kangaroo 140 pounds for the first 5 feet plus 5 pounds for every inch over 5 feet tall." Using the description, what height corresponds to a recommended weight of 155 pounds?
Answer provided by our tutors
let 'x' represent the number of inch above 5 ft
since 155 lbs > 140 lbs we conclude that the kangaroo is taller than 5 feet thus we have
140 + 5x = 155
by solving we find:
x = 3 in
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5 ft 3 in corresponds to a weight of 155 pounds.